How can we see different colours

We only know roses are red and sky is blue,but thanks to specialized cells in our eyes called "cones". When light hits an object , the object absorbs some of the light and reflects the rest of it. The wavelengths that reflected or absorbed depends on the properties of the object. Cones are one type... Continue Reading →

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Why sea water is salty?

After years and years of river inflow and evaporation, the salt content of the lake water built up to the present levels. The same process made the seas salty. Rivers carry dissolved salts to the ocean.Water evaporates from the oceans to fall again as rain and to feed the rivers, but the salts remain in... Continue Reading →

Will there be AC’s in future?

No,Scientists form the University of Colorado Boulder in US,have developed a new material,that can be used to cool houses or power plants without using electricity or water.The thin material,resembling an aluminium foil can manipulate the properties of light while allowing objects beneath it to passively radiate heat to cool off.The super material bounces 96% of... Continue Reading →

Braille SmartWatch

South Korean developer Dot has produced world's first Braille smartwatch that will help the blind people to send and receive messages.The watch comes with four cells of six tiny moving components and is inspired by Apples's minimalist feature.This watch connects to a smartphone via bluetooth and can receive any text from any app or services.

What is a black hole?

A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying. Because no light can get out, people can't see black holes. They are... Continue Reading →

Google tricks

1.You can use Google as a timer. Type "set timer to 12 minutes 45 seconds" in the search box and see for yourself. 2.You can play the hidden game “zerg rush.”  Type "Zerg Rush" in the search box. 3.You can calculate exact tip amount for your meals. You can also adjust the percentage and number of... Continue Reading →

How does SD card works?

SD is an abbreviation for "secure digital." The data on an SD card is stored in a digital format. The solid-state chip inside the card's plastic cover contains many tiny electrical circuits. When the card is not in use, the circuits retain their charges without any additional power. When a card is placed in an... Continue Reading →

Facts about human body

If you laid all of your blood vessels end to end they would stretch 60,000 miles, or around the world nearly two and a half times There are over 300 million capillaries in your lungs. If you stretched them out end to end they would reach across the United States You are about 1 cm... Continue Reading →

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